P0455 OBD Trouble Code

Evaporative Emission System Leak Detected (large leak)

EVAP Large Leak Detected Conditions

Cold engine startup completed (BTS input from 40-90°F, ECT input within 10°F of BTS input), then the test started and the PCM detected a leak of over 0 80" somewhere in the EVAP system during the EVAP Leak Test Refer to Monitor Test, code repair chart to test the EVAP system for small leaks (EVAP LDP system)

EVAP System Leak (No Purge Flow or Large Leak) Conditions

Cold startup, engine running at off-idle conditions then the PCM detected the presence of a large leak in the system Check the gas cap!

EVAP System Leak Detected Conditions

Engine running, ECT input 158-230°F, IAT input from 14-122°F, BARO input more than 75 kPa, fuel tank level from 25-75%, then PCM detected a fuel tank pressure that was within a specified value, purge accumulation time more than 200 seconds.

Evaporative emission (EVAP) canister purge system - gross leak

Wiring, fuel tank/cap, hose leak/ blockage, EVAP valve/canister, EVAP vent valve, BARO sensor, MAP/BARO switching valve, ECM